Hennepin Canal

The Hennepin canal was first conceived in 1834 as a connection between the Illinois and Mississippi River, but financial problems in the state delayed many public works projects. Pressure for transportation that was cheaper than rail convinced Congress to authorize preliminary surveys on the project in 1871. Construction began in 1892 and the first boat went through in 1907, reducing the distance from Chicago to Rock Island by 419 miles (674 km). While the canal was under construction, however, the Corps of Engineers undertook a widening of the locks on both the Illinois and Mississippi Rivers. The new locks on those rivers were twenty and forty feet wider than the canal locks, making them obsolete before their initial use. In the 1930s the Hennepin Canal was used primarily for recreational traffic. The Hennepin Canal, which at one time was known as the Illinois and Mississippi Canal, was open to boat traffic until 1951 at no cost. Ice made from the canal's frozen waters was sold during the winters to help pay the canal's maintenance costs.

The entire canal is now on the register of histroic places